Spring construction



Jan. 2, 1945. c i -M 2,366,607

SPRING CONSTRUCTION Filed May 12, 1943 IN V EN TOR. X0 6f flee/17a )7.

- Patented Jan. 2, 1945 SPRING CONSTRUCTION Lowell C. Freeman, Detroit, Mich, assignor to The Murray Corporation of America, Detroit, Mich, a corporation of Delaware Application May 12, 1943, Serial No. 486,691 6 Claims. (Cl. 155-179) This invention relates to spring constructions and particularly to a spring construction embodying a base separated from a spring platform by supporting elements which extend from the center of the base outwardly to the edges of the 1 platform.

In the co-pending application to M. K, Jessup, Serial No. 411,861, filed September 22, 1941, and assigned to the assignee of the present invention, a spring construction is illustrated, described and claimed, over which the present construction is an improvement. A base frame is employed having braces disposed thereacross to the central portion of which individual supporting wires are secured. These wires extend outwardly and upwardly to engage opposite border elements of a spring platform to support the platform spaced from the base frame while providing some resiliency thereto. In the structure of the copending application, the supporting wires'weredisposed transversely of the longitudinal dimension of the seat frame and no resistance was provided for preventing the top spring platform from moving laterally of the base frame.

While additional tie elements might be employed to produce lateral stability to the top spring platform, the present invention pertains to the employment of V-shaped elements, the ends of which are attached to the medial portions of adjacent bracing members of thebase frame, the web of which is secured to the border element of the top spring platform. One set of stabilizing elements is provided in the central portion of the spring construction in one embodiment of the invention, while in another embodiment the V-shaped supporting and stabilizing elements are employed throughout the longitudinal length of the seat structure.

Accordingly, the main objects of this invention are: to provide stability ,to a top spring platform which is supported by angularly disposed elements of the top spring platform; and, in general, to interconnect the base frame of a spring construction to a top spring platform by V-shaped elements which resiliently join the base frame and spring platform and retain them against relative lateral displacement, all of which is simple in construction and economical of manufacture.

Other objects and features of novelty of this invention will be specifically pointed out or will become apparent, when referring, for a better understanding of the invention, to the following description taken in conjunction with the accompanying drawing, wherein:

Figure 1 is a plan view, partly in section, of a seat construction embodying ,features of this invention;

Fig. 2 is an enlarged broken plan view of the frame portion of the seat construction illustrated in Fig. 1; a

Fig. 3 is a sectional view of structure illustrated in Fig. 2, taken on the line 3-3. thereof; and

Fig. 4 is a view of structure, similar to that illustrated in Fig. 2, showing a modified form thereof.

Referring to Figs. 1 to 3, inclusive, 9. spring construction is illustrated wherein a base frame 5 has a plurality of cross bracing and supporting elements 8 ofiset near the center at I to provide longitudinal extending attaching portions 8. A top spring platform is constructed from a-plurality of zig-zag spring strips 9 having the ends secured in spaced channel-shaped border elements 1 I, when the wall portions l2 are crimped thereover. A plurality of supporting wires l3 have one end secured to the supporting arms 8 of each bracing element 6 and other ends secured in the channel portion of the opposite border elements I I. Zig-zag spring strips it, have the convolutions disposed over the convolutlons of the ments on a base frame, by attaching the medial portions of V-shaped elements to opposite border elements of the top spring platform; to join a spring platform of a spring construction to a base frame with a plurality of supporting elements attached to the center of the base frame and the edges of the spring platform and with V-shaped elements, the medial portions of which are also attached/to the edges of the spring platform; to form a spring construction from a base frame having a V-shaped supporting and bracing elements, the ends of which are joined to the central portion of the base frame, the medial portion of which is attached to oppositeborder elestrips 9 to retain them in predetermined space relation to each other without resisting the deflection of the entire surface. The structure so far described is similar to that illustrated, disclosed and claimed in the above mentioned copending application. v

To provide lateral stability between the top spring platform and the base frame 5, the central portion of the spring construction illustrated in Figs. 1 to 3, inclusive, have the supporting wires l3 omitted and in lieu thereof V-shaped supporting elements It are employed having the ends attached to the adl acent central bracing element 6. The angle portions ll of the elements [8 are secured in the border channel elements I I, by the is of the V-shaped elements II are disposed in angular relation to each other and to the base fame and top platform to provide stability against relative lateral movement.

In Fig. 4, all of the wire supporting elements I3 have been eliminated and a plurality of pairs of V-shaped supporting elements I! have been substituted therefor. The elements It have their ends secured to adjacent pairs of the bracing elements 6 with the angle portion l'l thereof secured in the channel-shaped border element II by the crimpedportion l8. While stability is provided when employing the single supporting element iii in the central part of the spring construction, this stability is maintained and enhanced by the use of the plurality of like supporting elements" from one to the other end of the spring construction.

What isrlaimed is:

1. In a spring construction, a base frame, spaced transversely extending elements spanning said base frame, a spring platform having longitudinally extending spaced border elements interconnected by spring strips which extend thereacross, a plurality of wires extending from the central portion of said transversely extending elements of said base frame to said border elements of said platform and secured thereto, and v-shaped wire elements having the ends secured to the central portion of other transversely extending elements of the base frame and havin the angle portions of they-shaped wire elements joined to said border elements, said Wires and V-shaped elements supporting said platform on said base frame.

2. In a spring construction, a base frame. transversely disposed elements spanning said base frame, a spring platform having spaced border elements interconnected by spring strips which extend thereacross, V-shaped wire members having the ends joinedto the transversely disposed elements of the base frame and having the angle portions, of the V'-shaped wire members secured to said spaced border elements for supporting said platform on said base frame.

3. In a spring construction, a base frame, transversely disposed elements spanning said base frame, a spring latform embodying channel-shaped spaced border elements spanned by spring strips, and V-shaped wire elements hava,see,eo7

- ing the ends secured to the transversely disposed transversely disposed elements spanning s id ba e frame; a spring platform embodying channelshaped spaced border elements spanned by spring strips, v-shaped wire elements having the ends secured to the transversely disposed elements inwardly of the edges of the base frame and the angle portions of the v-shaped wire elements secured in the channel of said border elements, and individual wires ioining other of said transversely disposed elements to said border elements, said V-shaped wire elements and said individual wires roviding the sole support for said platform. a

5. In' a spring construction, a base frame, transversely disposed elements spanning said fram and having U shaped oflset portions near the longitudinal center line of the frame, a spring platform spaced from said base frame and including spaced border elements spanned by spring strips, and v-shaped members having the ends secured to the U-shaped oflset portions of said transversely disposed elements and having the angle portions thereof secured to the spaced border elements of said platform to support the platform on said base frame.

. 6. In a spring construction, a base frame,

transversely disposed elements spanning said frame and having U-shaped offset portions near the longitudinal center line of the frame, a spring platform spaced from said base frame and including spaced border elements spanned by spring strips, V-shaped members having the ends secured to th U-shaped offset portions of said transversely disposed elements and having the angle portions thereof secured to the spaced border elements of said platform, and individual wires joining others of said U-shaped oflset portions of said transversely disposed elements to the edges of said latform, said v-shaped members and said wires forming the sole support for said platform.

LOWELL C. FREEMAN. 

